A broadband piston compressor

A compressor and piston technology, applied in the field of compressors, can solve the problems of unstable low-frequency drive, increased cooling output, increased electromagnetic noise of aerodynamic noise motors, etc., achieving obvious noise reduction effect, reducing speed fluctuations, and improving low-frequency efficiency. Effect

Active Publication Date: 2022-06-07
ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the influence of motor parameters, compressor valve plate, piston and connecting rod, etc., only increasing the speed will lead to a decrease in volumetric efficiency, and the cooling output cannot increase with the increase in speed
When the maximum operating speed of the motor is increased according to the maximum cooling capacity demand of the compressor, its motor parameters will change accordingly. Under the influence of the load of the piston compressor, the low-frequency drive will be unstable
When the maximum operating frequency of the existing piston compressor is increased, its aerodynamic noise, mechanical noise and electromagnetic noise of the motor will increase significantly, and the high frequency band cannot meet the national standard
[0003] The ratio of the moment of inertia J of the motor rotor assembly of the existing piston compressor to the total weight M of the pump body piston and the connecting rod of the piston compressor is between 0.03 and 0.05, and the total weight M of the pump body piston and the connecting rod of the existing piston compressor The weight is heavy, resulting in a large reciprocating inertial force, which has a great impact on noise and vibration

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment provides a broadband piston compressor, such as figure 1 As shown, the wide-band piston compressor includes a cylinder head assembly 1, a muffler 2, a bolt 3, a stator iron core 4, a frame mounting foot 5 and a frame 6, wherein the stator iron core 4 is arranged on the frame 6 through the bolt 3. The frame is mounted on the feet 5 so that the stator core 4 is fixed with the frame 6 . The piston and connecting rod of the broadband piston compressor are as figure 2 As shown, the piston 8 is connected with the connecting rod 7 through a pin, and the connecting rod 7 is sleeved on the crankshaft 9. The crankshaft 9 is driven by the rotor to make a circular motion and the connecting rod 7 drives the piston 8 to reciprocate to compress the gas. The rotor components of the broadband piston compressor are as image 3 As shown, the rotor assembly 10 is installed on the pump body structure, the oil pump 11 is sleeved on one end of the crankshaft 9, the rotor as...

Embodiment 2

[0030] This embodiment provides a broadband piston compressor, and the structure of the broadband piston compressor is the same as that of the broadband piston compressor in Embodiment 1. In the broadband piston compressor provided in this embodiment, the ratio of the moment of inertia J of the rotor assembly 10 to the total mass M of the connecting rod 7 and the piston 8 is: J / M=0.116. The noise test of the broadband piston compressor provided in this embodiment and the existing piston compressor, the results are as follows Figure 4 shown, Figure 4 The line segment A marked in is the noise test result of the existing piston compressor, Figure 4 The B line segment marked in the noise test result of the broadband piston compressor provided in this embodiment. Compared with the existing piston compressor, the broadband piston compressor provided by this embodiment can reduce the torque fluctuation by adjusting the value of J / M, effectively improve the motor efficiency, and ...

Embodiment 3

[0035] This embodiment provides a broadband piston compressor, the maximum operating frequency of the broadband piston compressor exceeds 100 Hz, the components and structure of the broadband piston compressor are the same as the existing piston compressor, compared with the existing piston compressor The wide-band piston compressor is also provided with a compressor suction valve plate.

[0036] The ratio of the moment of inertia J of the rotor assembly 10 of the broadband piston compressor to the total mass M of the connecting rod 7 and the piston 8 is: 0.16>J / M>0.08, and simultaneously satisfies the moment of inertia J of the rotor assembly 10 and the broadband piston compressor The ratio of the stiffness A of the compressor suction valve sheet is: 0.0038>J / A>0.0024, where the unit of the stiffness A of the compressor suction valve sheet is N / m.

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Abstract

The invention relates to a broadband piston compressor, which includes a rotor assembly, a piston and a connecting rod. The ratio relationship between the moment of inertia J of the rotor assembly and the total weight M of the piston and the connecting rod is: 0.16>J / M> 0.08, the maximum operating frequency F of the broadband piston compressor is not less than 100Hz.

Description

technical field [0001] The invention relates to the field of compressors, in particular to a wide frequency piston compressor. Background technique [0002] The maximum operating frequency of the existing piston compressor is generally 75Hz, and the maximum output cooling capacity also remains unchanged under the condition of the same displacement. Under the influence of motor parameters, compressor valve plate, piston and connecting rod, etc., only increasing the speed will lead to a decrease in volumetric efficiency, and the cooling output cannot increase with the increase of speed. When the maximum running speed of the motor is increased according to the maximum cooling capacity of the compressor, its motor parameters will change accordingly. Under the influence of the load of the piston compressor, it will cause the low frequency drive to be unstable. When the maximum operating frequency of the existing piston compressor is increased, its aerodynamic noise, mechanical n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B35/04F04B39/00H02K1/22
CPCF04B35/04F04B39/0027H02K1/22F04B39/0005F04B39/0022Y02B30/70
Inventor 刘通吴广荣高东东张凯马梓净
Owner ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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